... adjustmentVVVAuto rangingVVAuto power offVVDataloggerV SensorSilicon photodiode and filterMeasuring range20(TM-203/205),200, 2000, 20000, 200000 Lux20,200, 2000, ... source TM-204)+/- 6%(other visible light source TM-203/205)Angle deviation fromcosine characteristics30º+/- 2%60º+/- 6% ... products you can contact us for cooperation Tenmars TM-203 Light Meter With Recorder Autoranging Datalogging Light and ...